How I Built a Free Invoice OCR That Runs 100% in Your Browser (Open Source)

Every expense report tool I’ve tried either required uploading sensitive invoices to someone else’s server or couldn’t handle Chinese invoices properly. So I built a browser-native solution.

Ticket-Check-Bro is an open-source, client-side invoice parser that extracts structured data from PDFs and images — all within the browser, no server upload.

What’s New in v1.4.1

• Multi-page PDF: reads ALL pages, not just the first 3
• Multi-format export: Excel (.xlsx) / CSV / JSON — amount fields exported as raw numbers
• Search & filter: find files by name, invoice number, or amount
• Summary dashboard: total amount + document type breakdown
• Confidence indicators: per-field confidence scores, low-confidence fields highlighted

Key Features

• 8 document types: Chinese VAT invoices, train tickets, flight itineraries, taxi receipts, fixed-amount receipts, toll invoices, vehicle invoices, and English invoices
• Dual engine: PDF text extraction (pdfjs-dist) + image OCR (Tesseract.js WASM)
• PDF merge with per-page selection
• Batch rename with template variables → ZIP download
• Drag-and-drop sort for file ordering
• i18n: English & Chinese UI
• Dark mode with system preference detection
• PWA: installable, works offline
• Keyboard shortcuts: Ctrl+O / Delete / Ctrl+E
• Session persistence: auto-save/restore via localStorage

Tech Stack

React 18 + Vite 5 + Zustand + pdfjs-dist + pdf-lib + Tesseract.js + SheetJS + JSZip

Links

• Live demo: https://ticket-check-bro.vercel.app/
• GitHub: https://github.com/bo-wu-feng-199/Ticket-Check-Bro

No signup. No install. Just open and drag your files in.